@article{DE_1996_32_10_a5,
     author = {D. P. Zeragi\^a},
     title = {Variational problems associated with extremal properties of the first eigenvalue of a problem of {Sturm-Liouville} type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1335--1340},
     publisher = {mathdoc},
     volume = {32},
     number = {10},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_10_a5/}
}